It has nothing to do with the picture. It should take about an hour to kick in. If it's weak then maybe you wont even feel the effects. Mostly depends how much is on one blotter. Im sure you're tripping by the time I posted this.
I don't know. Maybe you could build up an "immunity" and it takes more. I know alot of people don't get the "real" effect from weed their first time, or if they haven't smoked it in a while.
umm well its 30-60 minutes generally, doesnt matter whether u ate it yesterday or last year, although there is a tolerence that goes away after about a week.